* Revert "Treat type alias declarationlike function declaration (babel/babel-eslint#584)"
This reverts commit 020d012c554913fea137f4129798ce31a4896dfe.
A type alias shouldn't trigger a no-use-before-define warning just
like a function declaration.
Cyclic type dependencies are common when using flow.
For instance: type Node<T> = { head: T; tail: Node<T> }
Fixesbabel/babel-eslint#485
